Saw-dressing machine.



No. 811,835. ,7 PATENTBD FEB. 6, 1906 L, L; FILSTRUP. SAW DRESSING MACHINE. fi mgmmx nun HA8. 1. m4.

[Mari Z 297 jar-5i $9521 0 No, 811,835. PATENTED FEB. 6, 1906. L. L. FILSTREF.

SAW DRESSING MACHINE.

APPLIUATION FILED MAE. 1, 1904.

3 SKEET3-SHET 2 UNITED STATES PATENT OFFICE.

LARS L. FILSTRUP, OF CHICAGO, ILLINOIS, ASSIGNOR TO COVEL MANU- FACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

Specification of Letters Patent.

Patented Feb. 6, 1906.

Application filed March 1,1964. Serial No. 196,002.

To all whom it new concern:

Be it known that I, LABS L. FrLsTnUr, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Im provenient in Saw-Dressin Machines, of which the following is a speci ication.

My invention relates particuiarly to improvements in details of construction of sawdressing machines of the character described in Letters Patent No. 523,882, granted to Milo Covel July 31, 1894.

My primary object is to provide an improved table or support for the blade to be dressed, which will enable any desired bevel ,to be given to the blade while providing for adjustability in a plane at right angles to the grinding-wheel.

A further object is to provide for the grind ing-whecl arbor an improved bearing adjacent to the reciprocating cam which serves to reciprocate the arbor of grinding-wheel.

The invention is illustrated in its preferred embodiment in the accompanying drawings, in which Figure 1 represents a broken plan sections. view of my improved saw-dressing machine, the section being taken as indicated at line 1 of Fig. 3; Fi 2, an enlarged seetional view showing a etail at one end of the grinding-wheel arbor, the section being taken as indicated at line 2 of Fig. 1; Fi 3, a vertical sectional view taken as indicated at line 3 of Fig. 1; Fig. 3, a view of a detail of a lock for the table upon which the blade is clamped; Fig. 4, a broken section similar to Fig. 3, but showing a substitute table employed for use in sharpening a blade of diffcrent character from the blade shown in Fig. 1; and Fig. 5, a plan View of the table shown in Fig. 4.

The general construction of machines to which the present improvements relate is well understood in the art, and a detailed description of only so much of the machine as is related to the improvements will suffice for an understanding of the invention.

The preferred construction is as follows: A represents the frame of the machine; B, a carriage reciprocatingly mounted on the top of the frame and actuated through a lever B in a well-known manner; C, a grinding-wheel carried by an arbor C, journaled upon the carriage B and capable of moving longitudinally in its bearing; 0 C, pulleys through which motion is imparted to the grindingwheel; C, an idier mounted on a pivoted weighted frame C and acting as a tension device for the belt which communicates motion from the pulley G to the pulley C C", an arbor-actuating cam supported and actuated in the usual manner; D, a vertical guide connected with the front side of the frame of the machine; D, a slide or adjustable table-support connected with the guide D and vertically adjustable by means of a screw and worm-gear mechanism D D a table-base adjustable horizontally upon the support D; and D, Fig. 3, and D; Fig. 4, interchangcable table-tops for use in supportin blades of different character.

he frame A is substantially of a construction now well understood in the art, and the carriage B is mounted and actuated in the usual manner. The rinding-wheel arbor C is provided, Fig. 2,wit h a reduced end (2, upon which fits a cap 0 serving to retain an annular series of small balls 0 and a larger ball 0 bearing upon the smaller balls. The end of the cap 6 is perforated, allowing the ball 6 to project into contact with the cam C", as shown in Fig. 1. This construction provides an antifriction-bearing, which enables the corrugations of the cam C to pass the bearing freeiy in the operation of reciprocating the grinding-wheel arbor.

The guide D and slide Dhave dovetail connection, as shown, and the slide is rovided with a perforated threaded boss (1, in which works the screw 11, actuated by the worm and gear adjusting mechanism. The screw d is en ported by a boss (I? on the front side of the ame and is e nipped at its lower end with a worm-wheel d meshing with a horizontal worm d, having a stem d projecting beyond one end of the frame and equi pe with a handle (i The support D has a 101izontal top portion constituting a guide, upon which is mounted the table-base D the parts having suitable dovetail connection, as shown in 3. Connected with the suport D by a pivot d is a hand-lever (i joined y a ivot d with the base D a slot being provi ed at one of the pivotal connections in the usual manner. The base D is provided at the lateral edges of its inner end with lugs or standards (3 which receive pivotai screws d, is provided intermediately at its lateral edges with lugs d, and is provided at the lat eral edges of its outer end with lugs d. The lugs (1", Figs. 3 and 3, are provided at their upper ends with threaded perforations cl and at their lower ends with threaded perforations receiving set-screws d, which serve to clamp the table-base on its guide. The lugs d are provided, Fig. 4, with threaded perforations d. A pair of set-screws d" is provided, which are used interchangeably in the perforations cl and d to clamp the tabletop, depending upon which table-top is used, at any desired degree of inclination.

The table-top D is provided at the lateral edges of its inner end with pivotal lugs d, perforated to receive the inner ends of the pivotal screws d, and said table-top is provided at the lateral edges of its outer end with downwardly-projecting lugs (1 whose outer surfaces contact with the inner surfaces of the lugs (Z of the table-base.

The table base is provided with a setscrew d having an upwardly projecting stein bearing beneath the central portion of the outer end of the table-top D, as shown in Fig. 3. This set screw may be removed when the table-top D is substituted for the table-to D". The table-top D is equipped with a cl amp d of well-known constructlon.

The table-top D is provided at the lateral edges of its inner end with downturned lugs d, which are perforated to receive the inner ends of the pivotal screws d ,has downturned lugs d at the lateral edges of its outer end ada ted to contact with the inner surfaces of the l ugs d of the table-base, and is provided with forwardly-projecting lugs d receiving adjusting-screws d, whose lower ends bear u on the u per surface of the table-base, as s own in 1g. 4. The table-top D has a smooth upper surface and is provided with a slot receiving the heads of clam ing-bolts d, which serve in securin a bla e, such as a hog-knife or planer-kni e, in place.

The manner of use of the machine will be readily understood by those skilled in the art. When it is desired to use the machine as a scarfing-machine for dressing the ends of a band-saw pre aratory to brazing the same, the table-top T) is employed, the inner end being supported on the pivotal screws (1, the desired inclination of the table-to being lgiven by the adjusting-screw (1 an the tale-top being securel clamped to the tablebase by the screws bearing against the lugs d Figs. 1 and 3 show one end of a band-saw E, clamped to the table-top D by means of the clamp d. In the first ortion of the grinding o eration it is desirab e to secure the arbor o the grinding-wheel against lon itudinal movement in the usual manner an move the table out and in manually b means of the hand-lever (i while the grin ing-wheel is being reciprocated by its carriage, the object of this movement being to prevent uneven wearing of the grinding-wheel. \Vhen the finishing touches are being given to the bevel produced on the end of the blade, the table is clamped in the proper position by means of the screws (1' and the grindingwheel arbor is caused to oscillate or reciprocate in the usual manner, the table being vertically adjusted, so that the wheel will grind lightly. This insures a smooth even bevel. When it is desired to grind a blade, such as the hog-knife F, the table D is removed and the shorter table D applied, it being desirable in this instance to secure a greater inclination of the table than is possible with the table D. The inclination of the table D is adjusted by means of the screws Li and the screws (1" having been removed from the lugs d are employed to clamp the table-top securely to the lugs (Z of the table-base.

It Wlll be understood that changes within the scope of my invention may be made.

Hence no undue limitation should be under stood from. the foregoing detailed description.

What I regard as new, and desire to secure by Letters Fatent, is-

1. In a machine of the character described, the combination of a frame, a table-support connected therewith and provided with a horizontal guide projecting perpeljidicular to the adjacent side of the frame, a table-base mounted on said guide to move toward or away from said side of the frame, a table-top pivotally connected with said table-base near the inner edge thereof, and adjusting means connecting the table to and table base, whereby the inclination of the table-top may be varied, for the purpose set forth.

2. In a machine of the character described, a table-support equipped with a guide, a table-base mounted on said guide and provided at the inner portion with pivot-sup orts, interchangeable table tops provide at their inner portions with means for attaching them to said. ivot-supports, and means at different positions on the table-base for securing the outer ortions of the table-tops, whereby either tal ile-top may be used, as desired.

3. In a machine of the character described, the combination of a table-su ort equipped with a horizontal guide, a tablebase mounted on said guide, means for moving the tablebase on its guide, pivot-supports at the lateral edges of the inner portion of the tablesupport, a table-top pivoted thereon at its inner end, means for adjusting the outer end of the table top vertically, and means for clamping the table-top to the table-base after adjustment of inclination, for the purpose set forth.

4. The combination of a table-sup ort provided with a guide, a table-base adjustably connected with said guide, a table-top pivotally connected with the inner end of said table-base, an adjusting-screw for varying the height of the outer end of the table-top with relation to the table-base, and clampingserews serving to secure the table-to to the table-base after adjustment of the inc ination of the table-top.

5. A table-base for a machine of the character described, comprising a horizontal member provided at its inner end with lateral upturned pivotal lugs, intermediately with lateral upturned lu s for securing the outer end of a relatively short table-top, and at its outer end with lateral upturned lugs for securing the outer end of a relatively long table-top.

6. The combination with the frame and grinding-wheel of a machine of the character described, of" a table-support adjustable vertically with relation to the frame, and provided with a guide at right angles to the grinding-Wheel, a table-base adjustabiy eonneeted with said guide, and interchangeable table-tops for said table-base, for the purpose set forth.

7. A table-base for the purpose set forth, comprising a member equipped with guideconnecting means and provided at its inner end with a pair of relatively hi hi perforate pivotal in s, intermediateiy witi a pair of reiatively ow perforate securing-lugs, and at its outer end with a pair of perforate securing-iugs of intermediate length, for the purpose set forth.

8. in a machine of the character described, the combination with the frame thereof, of a vertically-movable table-support, a vertical screw connected therewith and e nipped with a Worm-Wheel, and a horizonta worm engaging said worni-wheei and :IOVidBd with a stern projecting past one on of the frame and equipped with a handie, for the purpose set forth.

LABS L. FXLSTRUP.

In presence of F. M. WIRTZ, WALTER N. WINBERG. 

